/* ============================================================================
   Vanta Visuals — immersive layer (loads after style.css)
   Loading screen · 3D canvas · features · FAQ · payment modal
   Reuses tokens from style.css (--violet, --muted, --glow, --ease ...).
   ========================================================================== */

/* ---------------------------------------------------------- loading screen --- */
#preloader{
  position:fixed; inset:0; z-index:9999;
  display:flex; align-items:center; justify-content:center;
  background:radial-gradient(120% 120% at 50% 35%, #0c0a18 0%, var(--bg) 72%);
  transition:opacity .8s var(--ease), visibility .8s;
}
#preloader.done{ opacity:0; visibility:hidden; pointer-events:none; }
.pre-inner{ display:flex; flex-direction:column; align-items:center; gap:22px; width:min(330px,80vw); text-align:center; }
.pre-logo{ width:76px; height:76px; overflow:visible; }
.pl-tri{ fill:none; stroke:var(--violet-2); stroke-width:3; stroke-linejoin:round;
  stroke-dasharray:300; stroke-dashoffset:300;
  animation:preDraw 2.2s var(--ease) infinite alternate;
  filter:drop-shadow(0 0 12px var(--glow)); }
.pl-tri-2{ stroke:var(--violet-3); animation-delay:.18s; stroke-dasharray:190; stroke-dashoffset:190; }
@keyframes preDraw{ to{ stroke-dashoffset:0; } }
.pre-name{ font-family:"Space Grotesk",sans-serif; font-weight:500; font-size:17px; letter-spacing:.34em; color:var(--muted); }
.pre-name b{ color:var(--text); font-weight:700; }
.pre-bar{ width:100%; height:3px; border-radius:99px; background:rgba(168,130,255,.12); overflow:hidden; }
.pre-bar span{ display:block; height:100%; width:0%; border-radius:99px;
  background:linear-gradient(90deg,var(--violet),var(--violet-3));
  box-shadow:0 0 14px var(--glow); transition:width .25s ease; }
.pre-meta{ display:flex; justify-content:space-between; width:100%;
  font-family:"JetBrains Mono",monospace; font-size:11px; color:var(--muted-2); letter-spacing:.06em; }
.pre-status{ text-transform:uppercase; }

/* prevent scroll/flash while loading */
body.vv-immersive.locked{ overflow:hidden; }

/* ---------------------------------------------------------------- 3d canvas --- */
#vanta-canvas{ position:fixed; inset:0; z-index:-1; width:100%; height:100%;
  display:block; pointer-events:none; opacity:0; transition:opacity 1.2s ease; }
#vanta-canvas.in{ opacity:1; }
.scene-veil{ position:fixed; inset:0; z-index:-1; pointer-events:none;
  background:radial-gradient(120% 80% at 50% 0%, transparent 45%, rgba(6,6,12,.55) 100%),
             linear-gradient(180deg, transparent 62%, var(--bg) 97%); }

/* ------------------------------------------------------------------- hero+ --- */
.hero{ position:relative; min-height:92svh; display:flex; flex-direction:column; justify-content:center; }
.scroll-hint{ position:absolute; bottom:8px; left:50%; transform:translateX(-50%);
  display:flex; flex-direction:column; align-items:center; gap:8px;
  font-size:10.5px; text-transform:uppercase; letter-spacing:.22em; color:var(--muted-2); }
.scroll-hint span{ width:22px; height:34px; border:1.5px solid var(--line-strong); border-radius:14px; position:relative; }
.scroll-hint span::after{ content:""; position:absolute; top:6px; left:50%; width:3px; height:6px; border-radius:2px;
  background:var(--violet-2); transform:translateX(-50%); animation:scrollDot 1.8s infinite; }
@keyframes scrollDot{ 0%{opacity:0;top:6px} 40%{opacity:1} 80%{opacity:0;top:18px} }

/* ----------------------------------------------------------------- sections --- */
.features-sec, .faq-sec{ padding:24px 0 12px; }
.section-head{ margin:0 0 30px; }
.section-head h2{ font-size:clamp(26px,4vw,42px); }
.section-head p{ color:var(--muted); margin-top:8px; }
.grad{ background:linear-gradient(100deg,var(--violet-2),var(--violet-3));
  -webkit-background-clip:text; background-clip:text; color:transparent; }

/* features grid */
.feature-grid{ display:grid; grid-template-columns:repeat(4,1fr); gap:16px; }
.feature-card{ background:var(--panel); border:1px solid var(--line); border-radius:var(--radius);
  padding:26px 22px; backdrop-filter:blur(14px); position:relative; overflow:hidden;
  transition:transform .35s var(--ease), border-color .35s; }
.feature-card::before{ content:""; position:absolute; inset:0; opacity:0; transition:opacity .35s;
  background:radial-gradient(120% 80% at 50% 0%, rgba(139,61,245,.16), transparent 60%); }
.feature-card:hover{ transform:translateY(-6px); border-color:var(--line-strong); }
.feature-card:hover::before{ opacity:1; }
.fc-ico{ width:46px; height:46px; border-radius:12px; display:grid; place-items:center; margin-bottom:16px;
  background:linear-gradient(135deg, rgba(139,61,245,.22), rgba(177,92,255,.1)); border:1px solid var(--line); position:relative; }
.fc-ico svg{ width:23px; height:23px; fill:none; stroke:var(--violet-3); stroke-width:1.7; stroke-linecap:round; stroke-linejoin:round; }
.feature-card h3{ font-family:"Space Grotesk",sans-serif; font-size:17px; margin-bottom:7px; }
.feature-card p{ font-size:13.5px; color:var(--muted); }

/* faq */
.faq-list{ max-width:760px; margin:0 auto; display:flex; flex-direction:column; gap:12px; }
.faq-item{ background:var(--panel); border:1px solid var(--line); border-radius:14px; overflow:hidden; backdrop-filter:blur(12px); }
.faq-q{ width:100%; background:none; border:none; color:var(--text);
  font-family:"Space Grotesk",sans-serif; font-size:16px; font-weight:500; text-align:left;
  padding:19px 22px; cursor:pointer; display:flex; justify-content:space-between; align-items:center; gap:16px; }
.faq-q svg{ width:18px; height:18px; flex-shrink:0; fill:none; stroke:var(--violet-2); stroke-width:2; transition:transform .3s var(--ease); }
.faq-item.open .faq-q svg{ transform:rotate(45deg); }
.faq-a{ max-height:0; overflow:hidden; transition:max-height .4s var(--ease); }
.faq-a p{ padding:0 22px 19px; color:var(--muted); font-size:14px; }

/* footer payment chips */
.foot-pay{ display:flex; gap:9px; justify-content:center; flex-wrap:wrap; margin-bottom:18px; }
.foot-pay span{ font-family:"JetBrains Mono",monospace; font-size:11px; color:var(--muted-2);
  padding:6px 13px; border:1px solid var(--line); border-radius:8px; }

.drawer-note{ text-align:center; font-size:12px; color:var(--muted-2); margin:12px 0 0; }

/* ------------------------------------------------------------- payment modal --- */
.pay-modal{ width:min(460px,94vw); background:var(--panel-solid); border:1px solid var(--line-strong);
  border-radius:22px; padding:28px; box-shadow:var(--shadow); }
.pay-modal h2{ font-size:23px; margin-bottom:4px; }
.pay-modal .pm-sub{ color:var(--muted); font-size:13.5px; margin-bottom:22px; }
.pay-methods{ display:flex; flex-direction:column; gap:10px; margin-bottom:18px; }
.pay-opt{ display:flex; align-items:center; gap:13px; padding:15px; border:1px solid var(--line);
  border-radius:14px; cursor:pointer; background:var(--panel); transition:border-color .2s, background .2s; }
.pay-opt:hover{ border-color:var(--line-strong); }
.pay-opt.active{ border-color:var(--violet-2); background:rgba(139,61,245,.12); }
.pay-ico{ width:42px; height:42px; border-radius:10px; display:grid; place-items:center; flex-shrink:0;
  border:1px solid var(--line); background:var(--bg-2); }
.pay-ico svg{ width:22px; height:22px; }
.pay-info{ flex:1; }
.pay-info b{ display:block; font-size:15px; }
.pay-info small{ font-size:12.5px; color:var(--muted-2); }
.pay-radio{ width:20px; height:20px; border-radius:50%; border:2px solid var(--line-strong); flex-shrink:0; position:relative; transition:border-color .2s; }
.pay-opt.active .pay-radio{ border-color:var(--violet-2); }
.pay-opt.active .pay-radio::after{ content:""; position:absolute; inset:3px; border-radius:50%; background:var(--violet-2); }
.pm-summary{ display:flex; justify-content:space-between; align-items:baseline; padding:15px 0;
  border-top:1px solid var(--line); margin-bottom:16px; }
.pm-summary span{ color:var(--muted); }
.pm-summary b{ font-family:"Space Grotesk",sans-serif; font-size:23px; }
.pm-secure{ display:flex; align-items:center; justify-content:center; gap:7px; font-size:12px; color:var(--muted-2); margin-top:13px; }
.pm-secure svg{ width:14px; height:14px; fill:none; stroke:currentColor; stroke-width:1.7; }
/* crypto sub-panel */
.crypto-net{ display:flex; gap:8px; margin-bottom:14px; }
.crypto-net button{ flex:1; background:var(--panel); border:1px solid var(--line); color:var(--muted);
  border-radius:10px; padding:9px 0; cursor:pointer; font-size:13px; transition:border-color .2s, color .2s, background .2s; }
.crypto-net button.active{ border-color:var(--violet-2); color:var(--text); background:rgba(139,61,245,.12); }
.crypto-qr{ width:154px; height:154px; margin:4px auto 14px; border-radius:12px; background:#fff; padding:9px; }
.crypto-qr img{ width:100%; height:100%; object-fit:contain; display:block; }
.crypto-addr{ display:flex; align-items:center; gap:10px; background:var(--bg-2); border:1px solid var(--line);
  border-radius:12px; padding:12px 14px; margin-bottom:12px; font-family:"JetBrains Mono",monospace;
  font-size:12px; word-break:break-all; }
.crypto-addr button{ margin-left:auto; flex-shrink:0; background:var(--violet); color:#fff; border:none;
  border-radius:8px; padding:7px 12px; font-size:12px; cursor:pointer; }
.crypto-hint{ font-size:12.5px; color:var(--muted); text-align:center; margin-bottom:16px; }
.crypto-hint b{ color:var(--text); }

/* ---------------------------------------------------------------- responsive --- */
@media (max-width: 980px){ .feature-grid{ grid-template-columns:repeat(2,1fr); } }
@media (max-width: 600px){ .feature-grid{ grid-template-columns:1fr; } }

@media (prefers-reduced-motion: reduce){
  #vanta-canvas{ transition:none; }
  .pl-tri{ animation:none; stroke-dashoffset:0; }
  .scroll-hint span::after{ animation:none; }
}